In a computer system, if there is 32:1 multiplex, find the numbers of input selectors and draw the common bus system?
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Answer:
Common Bus System using multiplexers
A typical computer has many registers and we need to transfer the information between these registers. A way to transfer the information is using the common bus system. In this article we shall discuss the common bus system using multiplexers.
Let’s discuss the common bus system with multiplexers.
The construction of this bus system for 4 registers is shown above. The bus consists of 4×1 multiplexers with 4 inputs and 1 output and 4 registers with bits numbered 0 to 3. There are 2 select inputs S0 and S1 which are connected to the select inputs of the multiplexers.
The output 1 of register A is connected to input 0 of MUX 1 and similarly other connections are made as shown in the diagram. The data transferred to the bus depends upon the select lines.